【摘要】 重点论述工程类比法在基于飞参数据进行飞机结构疲劳损伤计算中的应用。通过对两种机型、60多架飞机3 0 0 0 0多飞行小时数据的计算分析 ,提出结构疲劳损伤值 (取对数后 )与材料常数m成线性关系的观点。用工程类比法计算出的多架飞机累计损伤结果 ,其相对轻重水平 ,基本不随m值的不同而改变。在比较多架飞机疲劳损伤情况时 ,可以排除材料常数m的影响更多还原

【Abstract】 It is well know that the best way to manage the life of aircraft is to monitor fatigue consumption of each aircraft, which is very popular among western countries. However, it has not been applied in China, due to the shortage of reliable fatigue meters. With more and more new types of aircraft going to service, the situation has changed. It is possible now to manage the life of aircraft by monitoring its fatigue damage consumption, as each of new type of aircraft is equipped with flight parameter recorder. One of the most important aspects for monitoring aircraft fatigue consumption is to find a suitable method for calculating fatigue damage by using recorded flight parameters. Although many methods are available for calculating fatigue damage, none of those has been accepted. As the Miner theory is expressed in a very simple mathematics formula, it choice material constant m because there are big difference among the calculated results by using different value of the m.A method based on the relative Miner theory for calculating fatigue damage of aircraft is presented. A systematical study is carried out by calculating more than 30?000 hours of flight data recorded from 60 aircrafts of two types, from which a conclusion is drawn that the order of fatigue damage values calculated by this method for all aircrafts in one fleet are same no matter what value of material constant m is chosen. Therefore it is proven that this method is a valuable tool for monitoring aircraft fatigue consumptions.更多还原